1. First-class colleges refer to administrative units directly under universities, with the suffix of "university" or "college", such as Tsinghua University, Beijing Normal University and Central Academy of Fine Arts.
2. Second-level colleges refer to administrative units subordinate to first-level colleges, with the suffix of "College" or "Department", such as Tsinghua University Institute of Mathematical Sciences, School of History, Culture and Tourism Management of Beijing Normal University, and Sculpture Department of Central Academy of Fine Arts.